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Preparation method of aluminum foil composite packaging material

A composite packaging material and composite material technology are applied in the field of preparation of aluminum foil composite packaging materials, which can solve the problems of polluted contents, solvent residues, influence on ecological environment and human health, etc., and achieve the effect of good composite strength and good peel strength.

Active Publication Date: 2011-10-26
HUANGSHAN NOVEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dry lamination method generally uses solvent-based adhesives, which will not only produce solvent residues and pollute the packaged contents, but also produce a large amount of waste solvents, which will affect the ecological environment and human health.

Method used

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  • Preparation method of aluminum foil composite packaging material
  • Preparation method of aluminum foil composite packaging material
  • Preparation method of aluminum foil composite packaging material

Examples

Experimental program
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Effect test

preparation example Construction

[0025] The invention provides a method for preparing an aluminum foil composite packaging material, comprising the following steps:

[0026] Coating solvent-free adhesive to the substrate surface, the substrate is paper or high molecular polymer film, the sizing amount of the solvent-free adhesive is 2.4g / m 2 ~3.0g / m 2 ;

[0027] Composite the base material coated with the solvent-free adhesive and the aluminum foil, and the composite tension during the composite is 75N-85N;

[0028] Winding up the obtained composite material;

[0029] The rolled composite material is subjected to aging treatment to obtain an aluminum foil composite packaging material.

[0030] In the invention, the solvent-free adhesive is firstly coated on the base material, then compounded with aluminum foil, and the aluminum foil composite packaging material is obtained after winding and aging treatment. The invention obtains the aluminum foil composite packaging material with good performance by contr...

Embodiment 1

[0055] With 40g of food paper as the base material, the surface of the food paper is coated with a solvent-free adhesive of UR7515 produced by Henkel, Germany. The coating temperature is 45°C and the amount of glue applied is 2.4g / m 2 , the unwinding tension of the food paper is 18N; the food paper coated with the solvent-free adhesive is compounded with aluminum foil to obtain a composite material, the composite tension is 80N, and the unwinding tension of the aluminum foil is 2N; 25%; the composite material after winding is cured for 30h under the condition that the humidity is 75RH% and the temperature is 45°C, to obtain a food paper / aluminum foil composite film;

[0056] With the food paper / aluminum foil composite film as the base material, the surface of the aluminum foil is coated with a solvent-free adhesive of UR7515 produced by Henkel, Germany. The coating temperature is 45° C. m 2 , the unwinding tension of the food paper / aluminum foil composite film is 12N; the foo...

Embodiment 2

[0065] With a 12 μm thick PET film as the base material, the surface coating of the PET film produced by Henkel, Germany, the brand is the solvent-free adhesive of Liofl UR7750 / UR6071, wherein the mass ratio of 7750 and 6071 is 6: 1, The coating temperature is 45°C, and the amount of glue is 2.6g / m 2 , the unwinding tension of the PET film is 18N; the PET film coated with the solvent-free adhesive is compounded with aluminum foil to obtain a composite material, the composite tension is 80N, and the unwinding tension of the aluminum foil is 2N; the composite material is rewound, and the rewinding taper 25%; the composite material after winding was matured for 86 hours at a humidity of 45RH% and a temperature of 55°C to obtain a PET / aluminum foil composite film;

[0066] With the PET / aluminum foil composite film as the base material, the surface of the aluminum foil is coated with a solvent-free adhesive of Liofl UR7750 / UR6071 produced by Henkel, Germany, wherein the mass ratio ...

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Abstract

The invention provides a preparation method of an aluminum foil composite packaging material. The method comprises the following steps of: coating a solventless adhesive on a surface of a substrate, wherein the substrate is paper or a high polymer film, and the coating amount of the solventless adhesive is 2.4 -3.4 g / m<2>; compositing the substrate coated with the solventless adhesive with the aluminum foil with a composite tension of 75-85 N; rolling the obtained composite material; and curing the rolled composite material to obtain the aluminum foil composite packaging material. An experiment express that the coating amount of dry basis of 40g of food paper / Al / PE (polyethylene) composite film prepared by the method in the invention is 5.0 g / g / m<2>, the solvent residual amount is 0, the oxygen-resistance property can be 0.023 (g / g / m<2>.24 h), the moisture-resistance property can be 0.020 (cu.cm / g / m<2>.24 h.0.1 MPa), and the tensile strength can be 78 MPa.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a preparation method of an aluminum foil composite packaging material. Background technique [0002] Aluminum foil generally refers to aluminum with a purity of more than 99.5% and a thickness of less than 0.2mm. It has light weight, strong light-shielding properties, good insulation, good shape stability at high and low temperatures, soft texture, good ductility, and easy processing. Advantages, it is one of the most commonly used materials in modern packaging. However, aluminum foil is easy to form pinholes or wrinkles during packaging and use, thereby reducing its barrier performance. Therefore, aluminum foil is usually used in composite materials made of paper, polymers, or other metal sheets. Aluminum foil composite packaging materials not only have good barrier properties, but also have good mechanical strength and mechanical properties. They are su...

Claims

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Application Information

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IPC IPC(8): B32B15/04B32B15/20B32B7/12
Inventor 江继忠崔鹏鲍祖本潘健郝文涛胡鸿波
Owner HUANGSHAN NOVEL
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